datagridview中显示行号

通过RowPostPaint事件绘制行号，代码如下：

private void dgvAssessment_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e) { System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, dgvAssessment.RowHeadersWidth - 4, e.RowBounds.Height);
TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(), dgvAssessment.RowHeadersDefaultCellStyle.Font, rectangle, dgvAssessment.RowHeadersDefaultCellStyle.ForeColor, TextFormatFlags.VerticalCenter | TextFormatFlags.Right); }